Gold(III) adducts of 2-vinyl- and 2-ethylpyridine and cyclometallated derivatives of 2-vinylpyridine: Crystal structure of the cyclometallated derivative [Au(k

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• 作者：Maria Agostina Cinellu ; Fabio Cocco ; Giovanni Minghetti ; Sergio Stoccoro ; Antonio Zucca ; Mario Manassero
• 关键词：Gold(III) ; Nitrogen ligands ; Cyclometallated derivatives ; Alkene activation ; Crystal structure
• 刊名：Journal of Organometallic Chemistry
• 出版年：2009
• 出版时间：15 August 2009
• 年：2009
• 卷：694
• 期：18
• 页码：2949-2955
• 全文大小：317 K

文摘

Reaction of Na[AuCl₄] with 2-vinylpyridine (vinpy) and 2-ethylpyridine (etpy) affords the N-bonded adducts Au(Rpy)Cl₃ (R = CH₂CH, vinpy; CH₃CH₂, etpy). Cationic adducts, [Au(vinpy)₂Cl][X]₂ (X = BF₄, PF₆) and [Au(etpy)₂Cl₂][BF₄], were also obtained by reaction of Au(Rpy)Cl₃ with Rpy (1:1) and excess NaBF₄ or KPF₆. Thermal activation of Au(vinpy)Cl₃ in water gives the five-membered cycloaurated derivative [Au(k²-C,N–CH₂CH(Cl)–C₅H₄N)Cl₂] formally resulting through a trans nucleophilic addition of a chloride onto the CC bond. No cyclometallated derivatives are obtained by reactions of Au(etpy)Cl₃. An X-ray crystal structure determination on the PPh₃ derivative [Au(k²-C,N–CH₂CH(Cl)–C₅H₄N)(PPh₃)Cl][PF₆] was carried out.